National SWEP is a national non-profit professional association of persons involved or interested in environmental law, science, business, and policy. Members include attorneys, consulting scientists and engineers, non-profit organizations, students, educators, government employees, and the regulated community.

The purpose of National SWEP is to support the goals of the existing SWEP chapters and encourage the establishment of new SWEP chapters in other communities. SWEP's goals include encouragement of education and professional development, exchange of substantive information and work experiences, networking, and public service.